Last year, organizers at the Rocks Aroma Festival in Sydney, Australia, made an enormous image of the Mona Lisa using thousands of cups of coffee lightened with milk (to varying quantities) in order to create different shades:

The different colours were created by adding no, little or lots of milk to each cup of black coffee.

It measures an impressive 20 feet high and 13 feet wide and took a team of eight people three hours to complete.

I love coffee! And I also love art! But I don't like waste either. I would hope that the artist was smart enough to get the coffee from something that was already going to waste. While coffee joints try to be efficient, you'd be surprised by how much goes out the window.